| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.wm; |
| |
| import android.content.res.Configuration; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.view.IDisplayWindowListener; |
| |
| /** |
| * Manages dispatch of relevant hierarchy changes to interested listeners. Listeners are assumed |
| * to be remote. |
| */ |
| class DisplayWindowListenerController { |
| RemoteCallbackList<IDisplayWindowListener> mDisplayListeners = new RemoteCallbackList<>(); |
| |
| // private final ArrayList<DisplayContainerListener> mDisplayListeners = new ArrayList<>(); |
| private final WindowManagerService mService; |
| |
| DisplayWindowListenerController(WindowManagerService service) { |
| mService = service; |
| } |
| |
| void registerListener(IDisplayWindowListener listener) { |
| synchronized (mService.mGlobalLock) { |
| mDisplayListeners.register(listener); |
| try { |
| for (int i = 0; i < mService.mAtmService.mRootActivityContainer.getChildCount(); |
| ++i) { |
| ActivityDisplay d = mService.mAtmService.mRootActivityContainer.getChildAt(i); |
| listener.onDisplayAdded(d.mDisplayId); |
| } |
| } catch (RemoteException e) { } |
| } |
| } |
| |
| void unregisterListener(IDisplayWindowListener listener) { |
| mDisplayListeners.unregister(listener); |
| } |
| |
| void dispatchDisplayAdded(ActivityDisplay display) { |
| int count = mDisplayListeners.beginBroadcast(); |
| for (int i = 0; i < count; ++i) { |
| try { |
| mDisplayListeners.getBroadcastItem(i).onDisplayAdded(display.mDisplayId); |
| } catch (RemoteException e) { |
| } |
| } |
| mDisplayListeners.finishBroadcast(); |
| } |
| |
| void dispatchDisplayChanged(ActivityDisplay display, Configuration newConfig) { |
| // Only report changed if this has actually been added to the hierarchy already. |
| boolean isInHierarchy = false; |
| for (int i = 0; i < display.getParent().getChildCount(); ++i) { |
| if (display.getParent().getChildAt(i) == display) { |
| isInHierarchy = true; |
| } |
| } |
| if (!isInHierarchy) { |
| return; |
| } |
| int count = mDisplayListeners.beginBroadcast(); |
| for (int i = 0; i < count; ++i) { |
| try { |
| mDisplayListeners.getBroadcastItem(i).onDisplayConfigurationChanged( |
| display.mDisplayId, newConfig); |
| } catch (RemoteException e) { |
| } |
| } |
| mDisplayListeners.finishBroadcast(); |
| } |
| |
| void dispatchDisplayRemoved(ActivityDisplay display) { |
| int count = mDisplayListeners.beginBroadcast(); |
| for (int i = 0; i < count; ++i) { |
| try { |
| mDisplayListeners.getBroadcastItem(i).onDisplayRemoved(display.mDisplayId); |
| } catch (RemoteException e) { |
| } |
| } |
| mDisplayListeners.finishBroadcast(); |
| } |
| } |